如何用PHP在html中包含github html文件？

Suppose I have a HTML file as --
https://raw.github.com/USER/PROJECT/master/file.html

How do I make it available in my website. One method will be using the rawgithub service and then using something like iframe but I want the HTML to be inherited in my website so that Google shows it in the searches.

php's include function looks like doing the trick but I don't get it to work. I simply use
include "<file_full_URL>";

$url = "http://www.example.com"; //write your raw.github.com URL
$gethtml = file_get_contents($url);
echo $gethtml; //output the content in the page

In PHP you can use the file_get_contents() function to grab files over the internet.

$html = file_get_contents('https://raw.github.com/USER/PROJECT/master/file.html');
echo $html;

Your pages will be slower if you do this, though. Setting up a cronjob that downloads the file to your server periodically, and then serving it from your server, is a much better idea.

if you want to show it as code you can use this jquery plugin for that